Line-spacing and carriage-releasing mechanism for type-writing machines.



No. 822,210 PATENTED MAY 29, 1905. E. Gg LATTA.

LINE SPAING AND CARRMGE RELEASNG- MEG MAGHNES.

APPLICATION FILED MAY 14, 1904.

HANISM FOR TYPE WRITING 2 SHEETS-SHEET lV i??? j.

No. 022,210. TATNNTNN NIAY 29, 1906.

y E. 0. LNTTA. l LINE STNGING AND GANNTAGN NNIINISINN MTGNANISNI NoN TYPE WRITING MACHINES.

APPLIGATION FILED NNY 14. 1004.

2 SHEETS-SHEET Z.

/flo ringe?.

hlivllr il. L TA, GF JltllNDSHlP, NEW YHK, ASSIGNOR F UNE-HALF TO HARVEY A.. MOYER, GF SYR. USE NEW YORK.

Lili'E-SPAClNG AND CARlilGE-RELEASING MECHANISIVI FOR TYPE-WRETING VICHINES.

Specification of Letters Patent.

`iraxenteo may 29, 1906.

Original application led August Il, 1903, Serial No. 168,190. Divided and this application filed May 14, 1904. Serial No. 208,011.

To all whom t -may concern.:

Be it known that l, EMMU G. LATTA, a citizen of the United States, residing at Friendship, in the county oi Allegany and State of to make the impression at the front side ot'` the platen where the writing can be seen by the loperator without moving the carriage or platen.. Such a machine is disclosed .in my application for United States Letters Patent, Serial No, 168,190, Vfiled August 4i, 1903, oi which the present application a divisi. The improvements are, however, also apps.- cable to other forms oi type-writing inachinos.

One object oi the invention is to provide a simple and desirable mechanism for releasing the carriage-escapement to permit the carriage to be shifted manually and lor turning the platen to iced the paper or produce tno line-spacing.

Another obiect ol' the invention is to so construct the lino-sparing` mechanism that a part thereol also serves to aotuate the ribbon- ;lfeed device to move tno ribbon upon each actuation ol the line-syncing mechanism.

In the accompanying drawings, consisting of two sheets, Figure l is a transverse sectional elevation oi a portion oi a type-writing machine provided with line-spacing and ribbon-feeding .oxeohanism embodying the invention. Fig. 2 is a plan view tnereof. Fig. 3 is a longitudinal sectional elevai'lion tnereol',.showing the normal position. of the platen. Fig. -l is a similar view showing the platen and carriage lowered for printing npper-case characters` Fig. 5 is an end elevation of the carriage and its bearing. Fig. 6 is a horizontalsection of the bearing for one of the line-space levers in line 6 6, F ig.

Like letters of reference referto like parts in the several figures.

i therei or A represents theJ platen, which, as usual, has a shaft e, journaled to rotate on a carriage, which is movable laterally or crosswise of the machine on a stationary horizon'- tal rail or track B, Figs. 3,6, which extends across and is supported by the rear portion of the main frame l.

C, Fig. 3, represents one oi the type-bars, which are pivoted below and in iront of the platen on a curved segment c in such tposiront tion as to make the impression at the side of the platen.

The carriage shown in the drawings consiste of two end'pieoes or bars D and front and rear transversev horizontal connecting rods or bars d d. The rear bar passes loosely through hearing-brackets d2, Figs. 2, 3, and 5, secured by screws or otherwise to ears da, projecting rearwardly from the end portions oia bearing-bar e, which is supported by and slides on the stationary track B. The machine shown is oi that kind in which each type-bar is provided with two` characters, commonly called upper and lower ease characters, and the carriage is capable of being shifted downwardly from its normal position (shown in Fig. 3) to the position shown in Fig. i to properly place the printing-point to be engaged by the upper-case type. rod of the carriage is allowed to turn in its supporting-bearings. The carriage is held up in its normal position by springs f Fig. 2, coiled about the rear bar of the carriage and connected at' their opposite ends, respectively, to said bar .and to the bearing-brackets in any suitable manner. The springs permit the carriage to be moved downwardly by a shifting device (not shown) and return it to the normal position when For this purpose the rear transversereleased. The carriage may be constructed` and supported in any other suitable manner.

The platen is turned to feed the pa "er and produce ordinary line-spaces by the fo' lowing mechanism: G, Figs. 1, 2, and 5, represents a ratchet wheel or plate secured in any suit- ICO ' projecting from the adjacent side piece'oi the carnage by avscrew or pin h2. 'h3 is a spring which surrounds the ivot-pin h2 and is connected at its ends to t e side piece ofthe carrlage and line-space lever and acts to retain the lever'in its normal position. The linespace lever is provided at its front end with an arm which projects ltoward the ratchetplate and carries a pivoted pawl I, Fig. l, the upper free endV of which is adapted to engage with the ratchet-teeth to turn the platen. The pawl I is provided with a'depending arm or portion i, which rests in the normal' position of the lever on the adjacent portion of the front transverse rod al of the carriage anda'ctsas a stop for the lever and also to hold the pawl out of engagement with the teeth oft e ratchet-plate. When the lever is operated7 the rst portion of its movement lifts the lpawl ofic of the carriage-rod, and its free end all's into engagement with one ofthe `teeth of the ratchet-plate, which latter is turned by the further movement of the lever. The extent of rotary movement of the ratchetplate and platen is. determined by any suit- .able ad'ustable stop. For this purpose a curved ever 'el' is shown, which is pivoted Ion the end piece D of the carriage in rear of the platen-s aft and is provided at-its front end with a tooth or projection t2, adapted to spring into either of two or more recesses in t e endpiece of the carriage to hold the lever in diHerent stop positions. The platen can be held-against rearward ,rotation by any usu'al means. K, .Fi s. l to 4, represents a lever `similar to the line-space lever H, arrangled at the op osite end ofthe carriage and simi arly pivote thereto by a'suitable screw orlpin 7c. L, Figs. l, 3, and 4, is a'bar Ofanar shape in 'cross-sectijon which is arranged .longitudinally beneath the platen and is provided with`upturned ends Z, which arepivoted to arms m m on the line-space levers H K, respectively. f This bar connects the two levers sc that when the lever K at the left end `0f the carriage is operated power is transmitted therefrom to the other lever H at the right end ofthe carriage, and the platen is turned by the pawl and ratchet-plate, as above described. 'The two line-s ace levers and their connecting-rods thus'a ord means for turning the platen from either end therefof. The connecting-rod L. also constitutes the means for releasing theI carria e feed or escapement. and actuating the ri bon-feed track onfaj stud or axle projecting device,` ,as ,hereinafter explained. y

O, Figsfl, '3, and 4, represents av carriagedriving drum or barrel of any suitable construction which is, j ournaled at the rear of the machine'fbeneath the carriage-su porting om the rearp'oliftim of the main frame. The drumis y shaft and pivoted to the driven by an inclos'ed spiral spring p, connect-y ed thereto and to the drum-axle, and is provided with gear-teeth p, which mesh with rack-teeth p3 on the sliding bearing-bar of the carriage. The spring-drum tends to turn to the left and move thecarriage t'o the left, as usual, and is controlled or operated to move the carriage step by step to produce the letter-spacing byI esca which is fully descri tion.

Q, Figs. 3 and 4, represents a carriage-re-'- lease lever, which together with a ribbon-feed lever g, is pivoted on a bracket g', secured to the carriage-track, and extending forwardly beneath the platen. The release-lever is arran ed with its free end beneath the free end of tie ribbon-feed lever, which in turnis beneath the horizontal barL,connect in the linespace levers H K, so that when said ar is depressed by the operation of either of the linespace levers the ribbon-feed lever g is deed in my said applicaement mechanism p2,

pressed and striking the release-lever Q depresses the latter. The carriage-release lever is connected to the upper end of a rod g2, the lower end of which has a rearward extension which projects over the arm of the escapement-pawl g3.

The actuation of either line-space lever operates through the ribbon-feed lever, release-l lever, and rod g2 to disengage tile Aescapement-pawl from the ratchet-wheel, thereby avoiding the noise and wear of the parts of the carriage-escapement when the platen is turned and the carriage set back for a new line. The parts are so adjusted that a s lig'ht movement of either line-s. ace lever will release the escapernent-pawlp riage, and va further movement of the lever will turn the platen and move the ribbonfeed lever to Jfeed vthe ribbon, which isshown at R, as explained in my application for the' ribbon mechanism, Serial N o. 196,282, filed March 3,1904, The cross-sectional shape of the bar L, connecting the line-space levers, is such that when the platen is in the normal position Jfor printing lower-case characters its rear edge strikes and operates the ribbonfeed lever g, and when the carriage is lowered to print upper-case characters, as shown in Fig, 4, the bar is movedY downwardly and rearwardly, with its front edge or a rib thereon above the ribbon-feed lever in position to actuate the same.

I claim as my invention-f- 1. In a type-writing machine, the combination of a carriage, an escapement therefor, a rotatable platen and platen-shaft on said carriage, a toothed wheel at one end of said platen,- a lever adjacent to said toothed wheel aving an upright operating-arm located in front of the platen-shaft and a pivot extension proj ectingrearwardly under the platencarriage, a pawl on and free the care.

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